Feature Request: Session state management across multiple tabs/sessions

Problem

When working with Claude Code across multiple terminal tabs or sessions, there's no way to:

• Save the state of all active sessions at once
• Restore and resume work the next day
• Sessions can unexpectedly disappear, losing valuable context

Current Workaround

I've created personal custom commands (/done, /resume) that save session logs to CLAUDE.md and help restore context. However, this is manual and doesn't work across multiple parallel sessions.

Proposed Solution

Built-in session management, such as:

• /sessions - List all active/recent sessions
• /save-all - Snapshot all session states
• /restore - Select and restore a previous session

Use Case

At end of day, save all work-in-progress across multiple projects/tabs. Next morning, restore and continue seamlessly.